The M12 FUEL™ HACKZALL™ is the fastest and most powerful saw in its class, delivering over 4X longer run time, 70% faster cutting speed, and 6X longer tool life than competing saws. The compact, one-handed design provides superior control and the ability to cut in tight spaces. Its lightweight design is ideal for overhead cutting applications. The POWERSTATE™ brushless motor outperforms all its main competitors with constant power, while generating less heat with fewer components that can wear out. The REDLINK PLUS™ Intelligence circuit ensures optimized performance for your investment and protects it against overload, overheating, and over-discharge. The M12™ REDLITHIUM™ XC4.0 battery (not included) produces more work per charge and over the battery's lifespan than competing batteries. The dual-gear counterweight mechanism significantly reduces vibration, ensures faster starts in metal, and reduces user fatigue.